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The 32-Bit Version of a Program Runs More Slowly Than the 64-Bit Version on the 64-Bit Editions of Windows Server 2003

View products that this article applies to.


If you run a 64-bit version of a program that makes calls to the PSAPI library�for example EnumDeviceDrivers, GetDeviceDriverBaseNameA, and GetDeviceDriverFileNameA�the program runs as expected. However, if you run a 32-bit version of the same program that makes the same calls to the PSAPI library, the program runs much more slowly than expected, and every call that is made take several minutes to complete.

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Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

File Information

The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time      Version        Size      File name
   10-Jun-2003  20:38     5.2.3790.53    449,024   Wow64.dll

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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Keywords: KB822654, kbwinserv2003presp1fix, kbqfe, kbfix, kbbug, kbqfe, kbhotfixserver, kbautohotfix

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Article Info
Article ID : 822654
Revision : 13
Created on : 7/24/2007
Published on : 7/24/2007
Exists online : False
Views : 135